اسماء السيد العربى ابراهيم
مدرس
Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen)
Benha Journal of Applied Sciences • 2024
معلومات البحث
المؤلفون
Asmaa.E.El-Araby1*,Wael.D. Hagag1, Samir.Z.Kamh2 and Zakaria.E.Hamimi
الكلمات المفتاحية
Qena- Safaga Shear Zone, SRTM/PALSAR data, Shear zone-related structures, Dokhan Volcanics.
المجلة العلمية
Benha Journal of Applied Sciences
الناشر
Not Available
المجلد
Not Available
العدد
Not Available
الصفحات
Not Available
publication.type
Local
رابط البحث
Not Available
المواد المرفقة
Not Available
الملخص
The Qena- Safaga Shear Zone (QSSZ) is a megashear belt separating the Northern- and the Central- Tectonic Provinces
of the Egyptian Nubian Shield (ENS). Processing of remotely sensed data of the Landsat-8, ASTER and Sentinel 2A,
accompanied by field/structural investigation made it possible to construct a plausible structural map for this high strain
zone. A wide variety of Neoproterozoic litho-units outcrop in the area, including ophiolitic mélange, syn- tectonic
granitoids, late- tectonic granitoids, Dokhan Volcanics and post- tectonic granitoids. Dike swarms traverse some of these
units. The automatic lineament extraction using SRTM and PALSAR images verified that the dominant structural trend is
the NE-SW. Other trends, comprising E-W (to ENE-WSW), NW-SE (to NNW-SSE) and N-S (to NNE-SSW) are also
recognized. The main structural elements documented in the area embrace foliations and lineations, faults and shear zones,
as well as shear zone-related structures (e.g. folds, duplexes and flower structures). The sense of movement along the
aforementioned shear trends can be detected by a wide variety of kinematic indicators include mylonite, boudinage structure
and deformed pebbles. The geological structures documented along the QSSZ indicate a brittle-ductile tectonic regime
accompanied with voluminous granitic intrusions of various composition. Such structural and tectonic setting advocates a
complex tectonic history characterized by extensional and transtensional tectonic regimes. The obtained results are
significantly contributed to our knowledge on the high strain shear belts in the ENS.
of the Egyptian Nubian Shield (ENS). Processing of remotely sensed data of the Landsat-8, ASTER and Sentinel 2A,
accompanied by field/structural investigation made it possible to construct a plausible structural map for this high strain
zone. A wide variety of Neoproterozoic litho-units outcrop in the area, including ophiolitic mélange, syn- tectonic
granitoids, late- tectonic granitoids, Dokhan Volcanics and post- tectonic granitoids. Dike swarms traverse some of these
units. The automatic lineament extraction using SRTM and PALSAR images verified that the dominant structural trend is
the NE-SW. Other trends, comprising E-W (to ENE-WSW), NW-SE (to NNW-SSE) and N-S (to NNE-SSW) are also
recognized. The main structural elements documented in the area embrace foliations and lineations, faults and shear zones,
as well as shear zone-related structures (e.g. folds, duplexes and flower structures). The sense of movement along the
aforementioned shear trends can be detected by a wide variety of kinematic indicators include mylonite, boudinage structure
and deformed pebbles. The geological structures documented along the QSSZ indicate a brittle-ductile tectonic regime
accompanied with voluminous granitic intrusions of various composition. Such structural and tectonic setting advocates a
complex tectonic history characterized by extensional and transtensional tectonic regimes. The obtained results are
significantly contributed to our knowledge on the high strain shear belts in the ENS.
